What is CVE-2021-34433?

CVE-2021-34433 is a high-severity vulnerability in Eclipse Californium, classified under Key Exchange without Entity Authentication. CVSS score: 7.5/10. Published 2021-08-20.

How severe is CVE-2021-34433?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Eclipse Californium

CVE-2021-34433

In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Eclipse Californium — versions 3.0.0
The Eclipse Foundation Californium — versions 2.0.0, unspecified, 3.0.0-M1

Weakness classification (CWE)

References

emo@eclipse.org (x_refsource_CONFIRM, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34433?: CVE-2021-34433 is a high-severity vulnerability in Eclipse Californium, classified under Key Exchange without Entity Authentication. CVSS score: 7.5/10. Published 2021-08-20.
How severe is CVE-2021-34433?: High severity. CVSS v3 base score is 7.5 out of 10.